Add OSRM and OTP Docker services with setup scripts

Adds osrm-foot, osrm-bicycle, and otp services to Docker Compose under
a 'routing' profile (opt-in). Setup scripts download Greater London OSM
data and pre-process for OSRM foot/bicycle profiles, plus TfL GTFS for
OTP transit. Routing engine env vars added to .env.sample.

scripts/otp-setup.sh

@@ -0,0 +1,94 @@
+#!/usr/bin/env bash
+# OpenTripPlanner data setup script for Greater London
+# Downloads OSM extract and TfL GTFS feeds for transit routing.
+#
+# Usage:
+#   ./scripts/otp-setup.sh [DATA_DIR]
+#
+# DATA_DIR defaults to ./otp-data/
+# The directory is suitable for mounting as /var/opentripplanner in OTP container.
+
+set -euo pipefail
+
+DATA_DIR="${1:-./otp-data}"
+GEOFABRIK_URL="https://download.geofabrik.de/europe/great-britain/england/greater-london-latest.osm.pbf"
+OSM_FILE="greater-london-latest.osm.pbf"
+
+# TfL GTFS feeds (Bus Open Data Service + TfL open data)
+# These URLs may need updating; check https://data.bus-data.dft.gov.uk/ and TfL API
+TFL_GTFS_URLS=(
+    "https://data.bus-data.dft.gov.uk/timetable/download/gtfs-file/london/"
+)
+
+echo "==> OTP Setup for Greater London"
+echo "    Data directory: ${DATA_DIR}"
+
+mkdir -p "${DATA_DIR}"
+
+# Download OSM extract
+if [ ! -f "${DATA_DIR}/${OSM_FILE}" ]; then
+    echo "==> Downloading Greater London OSM extract..."
+    curl -L -o "${DATA_DIR}/${OSM_FILE}" "${GEOFABRIK_URL}"
+else
+    echo "==> OSM extract already downloaded"
+fi
+
+# Download GTFS feeds
+for i in "${!TFL_GTFS_URLS[@]}"; do
+    GTFS_FILE="gtfs-london-${i}.zip"
+    if [ ! -f "${DATA_DIR}/${GTFS_FILE}" ]; then
+        echo "==> Downloading GTFS feed ${i}..."
+        curl -L -o "${DATA_DIR}/${GTFS_FILE}" "${TFL_GTFS_URLS[$i]}" || {
+            echo "    WARNING: Failed to download GTFS feed from ${TFL_GTFS_URLS[$i]}"
+            echo "    You may need to manually download GTFS data."
+            echo "    Check: https://data.bus-data.dft.gov.uk/"
+            echo "    Place .zip files in ${DATA_DIR}/"
+        }
+    else
+        echo "==> GTFS feed ${i} already downloaded"
+    fi
+done
+
+# Create OTP build config if not present
+if [ ! -f "${DATA_DIR}/build-config.json" ]; then
+    echo "==> Creating OTP build config..."
+    cat > "${DATA_DIR}/build-config.json" << 'EOF'
+{
+  "osm": [
+    {
+      "source": "greater-london-latest.osm.pbf"
+    }
+  ],
+  "transitFeeds": [
+    {
+      "type": "gtfs",
+      "source": "gtfs-london-0.zip"
+    }
+  ]
+}
+EOF
+fi
+
+# Create OTP router config if not present
+if [ ! -f "${DATA_DIR}/router-config.json" ]; then
+    echo "==> Creating OTP router config..."
+    cat > "${DATA_DIR}/router-config.json" << 'EOF'
+{
+  "routingDefaults": {
+    "walkSpeed": 1.3,
+    "bikeSpeed": 5.0,
+    "numItineraries": 3
+  }
+}
+EOF
+fi
+
+echo ""
+echo "==> OTP setup complete!"
+echo "    Mount ${DATA_DIR} as /var/opentripplanner in OTP container."
+echo ""
+echo "    OTP will build the transit graph on first startup (~2 min for London)."
+echo ""
+echo "    Example:"
+echo "      docker run -p 8080:8080 -v ${DATA_DIR}:/var/opentripplanner \\"
+echo "        opentripplanner/opentripplanner:2.6.0 --load --serve"